采用ANSYS/LS-DYNA有限元模拟软件对G105级钢调质钻杆六辊矫直过程进行了数值模拟,分析了矫直过程中钢管的应力应变情况及矫直后的残余应力分布状态。结果表明,经矫直后的钢管存在很大残余应力,且残余应力呈螺旋形分布,钢管内表面轴向和切向应力为压应力,外表面为拉应力,且切向应力数值较大。 The six-roll straightening process of G105 steel quenched and tempered drill pipe was simulated by ANSYS / LS-DYNA finite element software. The stress and strain of steel pipe during straightening and the distribution of residual stress after straightening were analyzed. The results show that the straightened steel pipe has a large residual stress and the residual stress is spirally distributed. The axial and tangential stress on the inner surface of the steel pipe is compressive stress, the outer surface is tensile stress, and the tangential stress value is large.